Every year on March 14, schools and the media celebrate Pi Day, noting that the usual American way to write the date, 3.14, is Pi to two decimal places.
This year, I used a request to comment on some other famous mathematical constants to sneak in a bit of PR for SUMOP. See the full post on LiveScience, where various mathematicians discuss nine illustrious mathematical constants besides Pi.
Pi Day was first celebrated in 1988 as a fun PR ruse for math, and in 2009, the U.S. House of Representatives recognized March 14, 2009 as National Pi Day.
Mathematics Outreach Project (SUMOP) 